The modern atomic theory has been updated over the years as new observations of the atom have been made. what do these changes say about the strength of the modern atomic theory? the changes make the theory weaker because they demonstrate that the scientific community can't agree on the properties of atoms. the changes make the theory weaker because they demonstrate that the original atomic theory was flawed, so all resulting theories are also flawed. the changes make the theory stronger because it has been tested and edited multiple times, making it more durable. the changes make the theory stronger because each time the theory is changed, it becomes more popular.

The correct answer is option C.

The changes make the theory stronger because it has been tested and edited multiple times, making it more durable.

A scientific theory is an explanation of the empirical data in the universe. It is based on facts and is very often subjected to rigorous scientific scrutiny. Repeated testing of the scientific theory helps to add to the body of scientific knowledge. Due to advancement in the scientific method, scientific theories are tested, modified and verified following observation, data collection and evaluation of results.

a

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2